In Reply In a response to our article, “Associations Between Screen-Based Media Use and Brain White Matter Integrity in Preschool-Aged Children,”1 Pall claims that findings of lower microstructural integrity and language and literacy skills correlated with higher screen use may be attributable to electromagnetic field (EMF) exposures. As mobile digital devices linked via wireless connectivity are increasingly used by ever-younger children, this is an important public health issue. The American Academy of Pediatrics issued a statement2 in 2016 based on research findings in rats, encouraging caution with mobile devices and that more research is needed.